[LayoutNG] Fix enum values to conform to kEnumName in style guide.

third_party/WebKit/Source/core/layout/ng/ng_text_layout_algorithm.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "core/layout/ng/ng_text_layout_algorithm.h"
 
 #include "core/layout/ng/ng_break_token.h"
 #include "core/layout/ng/ng_constraint_space.h"
 
 namespace blink {
 
 NGTextLayoutAlgorithm::NGTextLayoutAlgorithm(
     NGInlineNode* inline_box,
     NGConstraintSpace* constraint_space,
     NGBreakToken* break_token)
     : inline_box_(inline_box),
       constraint_space_(constraint_space),
       break_token_(break_token) {
   DCHECK(inline_box_);
 }
 
 NGLayoutStatus NGTextLayoutAlgorithm::Layout(
     NGFragmentBase*,
     NGPhysicalFragmentBase** fragment_out,
     NGLayoutAlgorithm**) {
   // TODO(layout-dev): implement.
   *fragment_out = nullptr;
-  return NewFragment;
+  return kNewFragment;
 }
 
 DEFINE_TRACE(NGTextLayoutAlgorithm) {
   NGLayoutAlgorithm::trace(visitor);
   visitor->trace(inline_box_);
   visitor->trace(constraint_space_);
   visitor->trace(break_token_);
 }
 
 }  // namespace blink